ok, so i want to build a semi-long term shelter. i have access to nails and rope, a hatchet and plenty of knives. i have an Etool and could possibly get scrap wood or some other stuff. other than that, i have tarps. maybe access to a chainsaw sometimes. what can i do? i also have little to no money to spend on this. i live in michigan and there is mostly hardwoods here like maple, oak and walnut. very few pine trees.